๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Further researches on some statistics of Coffea (fourth communication)

โœ Scribed by P. C. van der Wolk


Publisher
Springer
Year
1915
Tongue
English
Weight
410 KB
Volume
13
Category
Article
ISSN
1617-4615

No coin nor oath required. For personal study only.


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The report contains results of a study of hearing loss in the underground coal mining industry. Hearing tests are given to 1500 miners by NIOSH at 11 randomly selected coal mines in Kentucky, Pennsylvania, and West Virginia. Noise surveys are performed at the same mines by personnel of the Mining En